scripts: Remove ICC-related dead code

Intel compiler support has already been completely removed in commit
95207db8 ("Remove Intel compiler support").  However, it appears
that there is still some ICC-related code in scripts/cc-version.sh.
There is no harm in leaving the code as it is, but removing the dead
code makes the codebase a bit cleaner.

Hopefully all ICC-related stuff in the build scripts will be removed
after this commit, given the grep output as below:

	(linux/scripts) $ grep -i -w -R 'icc'
	cc-version.sh:ICC)
	cc-version.sh:	min_version=$($min_tool_version icc)
	dtc/include-prefixes/arm64/qcom/sm6350.dtsi:#include <dt-bindings/interconnect/qcom,icc.h>

Fixes: 95207db8 ("Remove Intel compiler support")
Signed-off-by: Ruihan Li <lrh2000@pku.edu.cn>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/cc-version.sh

@@ -45,10 +45,6 @@ Clang)
 	version=$2.$3.$4
 	min_version=$($min_tool_version llvm)
 	;;
-ICC)
-	version=$(($2 / 100)).$(($2 % 100)).$3
-	min_version=$($min_tool_version icc)
-	;;
 *)
 	echo "$orig_args: unknown C compiler" >&2
 	exit 1