Revert "mac: display warning to use alt-build on <10.15"

This reverts commit 2b45ba9.

Makefile.in

@@ -45,7 +45,6 @@ REAL_CUDA_COMPILER = "@CUDA_COMPILER@"
 CUDA_COMPILER_0 = @echo "Compiling $<..."; $(REAL_CUDA_COMPILER)
 CUDA_COMPILER_1 = $(REAL_CUDA_COMPILER)
 CUDA_COMPILER   = $(CUDA_COMPILER_$(VERBOSE))
-MACOS_LEGACY  = @MACOS_LEGACY@
 SYSTEM	      = @system@
 
 GUI_EXE       = @GUI_EXE@
@@ -659,12 +658,6 @@ $(GUI_BUNDLE)/Contents/libs: $(BUNDLE)/Contents/libs $(GUI_BUNDLE)
 	cp -R $(BUNDLE)/Contents/Frameworks/* $(GUI_BUNDLE)/Contents/Frameworks
 	# add Qt frameworks
 	command -v macdeployqt && macdeployqt $(GUI_BUNDLE) -verbose=2 -executable=$(GUI_BUNDLE)/Contents/MacOS/uv -executable=$(GUI_BUNDLE)/Contents/MacOS/hd-rum-transcode
-	if [ $(MACOS_LEGACY) = no ]; then \
-		for n in $(GUI_BUNDLE)/Contents/MacOS/*; do \
-			if expr $$n : '.*-real' >/dev/null; then continue; fi; \
-			mv -f $$n $$n-real; cp -f $(srcdir)/data/scripts/macos-wrapper $$n; \
-		done; \
-	fi
 	test -d $(GUI_BUNDLE)/Contents/Resources || mkdir $(GUI_BUNDLE)/Contents/Resources
 	defaults write `pwd`/$(GUI_BUNDLE)/Contents/Info.plist NSCameraUsageDescription 'Allow camera for video capture'
 	defaults write `pwd`/$(GUI_BUNDLE)/Contents/Info.plist NSMicrophoneUsageDescription 'Allow microphone for audio capture'

configure.ac

@@ -144,11 +144,6 @@ if test $system = Linux; then
 fi
 
 if test $system = MacOSX; then
-        MACOS_LEGACY=no
-        os_version_major=`uname -r |cut -d . -f 1`
-        if test $os_version_major -lt 19; then # Darwin 19.0.0 is macOS 10.15
-                MACOS_LEGACY=yes
-        fi
         COMMON_OSX_FLAGS="${COMMON_OSX_FLAGS:+$COMMON_OSX_FLAGS }-iframework data/redists -stdlib=libc++"
 	CFLAGS="$CFLAGS $COMMON_OSX_FLAGS"
 	CPPFLAGS="$CPPFLAGS $COMMON_OSX_FLAGS"