fix(#3147): remove sigma

[maxonfjvipon]

Closes: #3147

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PR-Codex overview

This PR removes unused classes, constants, and methods. It refactors constructors and simplifies code structure.

Detailed summary

• Deleted unused classes and resources
• Removed constant SIGMA
• Refactored constructors in multiple classes
• Simplified method implementations

The following files were skipped due to too many changes: eo-runtime/src/main/java/EOorg/EOeolang/EOfloat$EOplus.java, eo-runtime/src/main/eo/org/eolang/malloc.eo, eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOright.java, eo-runtime/src/main/java/EOorg/EOeolang/EOfloat$EOtimes.java, eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOconcat.java, eo-runtime/src/main/java/EOorg/EOeolang/EOstring$EOlength.java, eo-runtime/src/main/eo/org/eolang/nan.eo, eo-runtime/src/main/java/EOorg/EOeolang/EOstring$EOas_bytes.java, eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml, eo-maven-plugin/src/main/resources/org/eolang/maven/pre/attrs.xsl, eo-runtime/src/main/java/org/eolang/Main.java, /eo-runtime/src/main/java/EOorg/EOeolang/EOmalloc$EOof$EO\317\206.java", eo-runtime/src/main/eo/org/eolang/go.eo, eo-runtime/src/test/java/org/eolang/PhDataTest.java, eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOslice.java, eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOsize.java, eo-runtime/src/main/java/EOorg/EOeolang/EOstring$EOslice.java, /eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EOencaged$EO\317\206.java", eo-runtime/src/test/java/EOorg/EOeolang/EOfailed.java, eo-runtime/src/test/eo/org/eolang/switch-tests.eo, eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOstdout.java, eo-runtime/src/test/eo/org/eolang/goto-tests.eo, eo-runtime/src/test/eo/org/eolang/seq-tests.eo, eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/synthetic-attributes-with-to-java.yaml, eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml, eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/converts-to-java-with-arrays-and-scopes.yaml, /eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EO\317\206.java", eo-runtime/src/main/java/org/eolang/AtRho.java, eo-runtime/src/test/java/EOorg/EOeolang/EOintTest.java, eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/embedded-class.yaml, eo-runtime/src/test/java/org/eolang/ExInterruptedTest.java, eo-runtime/src/test/eo/org/eolang/string-tests.eo, eo-runtime/src/main/java/org/eolang/AtSetRho.java, eo-runtime/src/main/eo/org/eolang/negative-infinity.eo, eo-runtime/src/main/eo/org/eolang/positive-infinity.eo, eo-runtime/src/test/java/EOorg/EOeolang/EOseqTest.java, eo-runtime/src/main/java/org/eolang/PhWrite.java, eo-runtime/src/test/eo/org/eolang/tuple-tests.eo, eo-runtime/src/test/eo/org/eolang/malloc-tests.eo, eo-runtime/src/test/eo/org/eolang/try-tests.eo, eo-runtime/src/main/java/EOorg/EOeolang/EOio/Input.java, eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/specials.yaml, eo-runtime/src/test/java/org/eolang/PhMethodTest.java, eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/dot-home.yaml, eo-runtime/src/test/eo/org/eolang/cage-tests.eo, eo-runtime/src/test/eo/org/eolang/while-tests.eo, eo-maven-plugin/src/main/resources/org/eolang/maven/phi/to-phi.xsl, eo-runtime/src/test/java/EOorg/EOeolang/EOcageTest.java, eo-runtime/src/test/java/org/eolang/DataizedTest.java, eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/auto-named.yaml, eo-runtime/src/test/java/EOorg/EOeolang/EOtupleEOatTest.java, eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bool-tests-straight.yaml, eo-runtime/src/test/java/EOorg/EOeolang/EOio/EOstdoutTest.java, eo-runtime/src/main/java/org/eolang/PhDefault.java, eo-runtime/src/test/java/EOorg/EOeolang/EOtryTest.java, eo-runtime/src/test/java/org/eolang/PhWithTest.java, eo-runtime/src/test/java/org/eolang/UniverseDefaultTest.java, eo-runtime/src/test/eo/org/eolang/rust-tests.eo, eo-runtime/src/test/eo/org/eolang/runtime-tests.eo, eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml, eo-runtime/src/test/java/EOorg/EOeolang/EOio/EOstdinTest.java, eo-runtime/src/test/java/org/eolang/PhDefaultTest.java, eo-maven-plugin/src/main/resources/org/eolang/maven/pre/to-java.xsl

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[maxonfjvipon]

@yegor256 please check

[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 22min)