SC2091: Remove surrounding $() to avoid executing output.

ShellCheck has detected that you have a command that just consists of a
command substitution.

This is typically done in order to try to get the shell to execute a
command, because $(..) does indeed execute commands. However, it's also
replaced by the output of that command.

PR:		227109
Submitted by:	mat
Sponsored by:	Absolight

Mk/Scripts/qa.sh

@@ -657,7 +657,7 @@ proxydeps() {
 			if listcontains ${dep_file} "${already}"; then
 				continue
 			fi
-			if $(pkg which -q ${dep_file} > /dev/null 2>&1); then
+			if pkg which -q ${dep_file} > /dev/null 2>&1; then
 				dep_file_pkg=$(pkg which -qo ${dep_file})
 
 				# Check that the .so we need has a SONAME