target/adiv5: remove unused try except block

This try execpt block was watching for a timeout, but there are at the
moment no timeout exceptions thrown in the codebase

The original exeption present in the adiv5_dp_read stack this code was
likely handling was removed in commit:
0c63903
where the abort to recover from bad access implemented by the
exeption case of this block was also implemented at a lower level
this means the exception block code was never run, and the re-read on
timeout probably stoped happening since then

Currently a protocol recovery mechanism is implemented which should
provide the functionality this code was originally trying to employ

src/target/adiv5.c

@@ -874,15 +874,8 @@ void adiv5_dp_init(adiv5_debug_port_s *const dp, const uint32_t idcode)
 		return;
 	}
 
-	volatile uint32_t ctrlstat = 0;
-	TRY_CATCH (e, EXCEPTION_TIMEOUT) {
-		ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
-	}
-	if (e.type) {
-		DEBUG_WARN("DP not responding! Trying abort sequence...\n");
-		adiv5_dp_abort(dp, ADIV5_DP_ABORT_DAPABORT);
-		ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
-	}
+	/* Read DP Control/Status */
+	uint32_t ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
 
 	platform_timeout_s timeout;
 	platform_timeout_set(&timeout, 201);