Merge #10771: Remove unused variables in shell scripts

ab8e8b9 Remove unused variables in shell scripts. (practicalswift)

Pull request description:

  Remove unused variables in shell scripts. Use `_` where we don't care about the result.

Tree-SHA512: 35049e79ee432c805f061456c32902a92811b5214d50ce6770b22d1442cc5999ed53cfe05bb2347f6995ca33c707a0f3fe92d5829c0385c4a3e254953924cbc4

contrib/verify-commits/verify-commits.sh

@@ -12,8 +12,6 @@ VERIFIED_ROOT=$(cat "${DIR}/trusted-git-root")
 VERIFIED_SHA512_ROOT=$(cat "${DIR}/trusted-sha512-root-commit")
 REVSIG_ALLOWED=$(cat "${DIR}/allow-revsig-commits")
 
-HAVE_FAILED=false
-
 HAVE_GNU_SHA512=1
 [ ! -x "$(which sha512sum)" ] && HAVE_GNU_SHA512=0
 
@@ -95,9 +93,9 @@ while true; do
 		FILE_HASHES=""
 		for FILE in $(git ls-tree --full-tree -r --name-only "$CURRENT_COMMIT" | LC_ALL=C sort); do
 			if [ "$HAVE_GNU_SHA512" = 1 ]; then
-				HASH=$(git cat-file blob "$CURRENT_COMMIT":"$FILE" | sha512sum | { read FIRST OTHER; echo $FIRST; } )
+				HASH=$(git cat-file blob "$CURRENT_COMMIT":"$FILE" | sha512sum | { read FIRST _; echo $FIRST; } )
 			else
-				HASH=$(git cat-file blob "$CURRENT_COMMIT":"$FILE" | shasum -a 512 | { read FIRST OTHER; echo $FIRST; } )
+				HASH=$(git cat-file blob "$CURRENT_COMMIT":"$FILE" | shasum -a 512 | { read FIRST _; echo $FIRST; } )
 			fi
 			[ "$FILE_HASHES" != "" ] && FILE_HASHES="$FILE_HASHES"'
 '