Constants/RestrictedConstants: fix nonsensical comparison

The only token this sniff needs to check for (at this time) is the `T_STRING` token, which is used for both constant names as well as function names.

Any other token in the `Tokens::$functionNameTokens` token array will never match the subsequent contents comparison anyhow.

Author: jrfnl

WordPressVIPMinimum/Sniffs/Constants/RestrictedConstantsSniff.php

@@ -126,7 +126,7 @@ public function process_token( $stackPtr ) {
 			return;
 		}
 
-		if ( in_array( $this->tokens[ $previous ]['code'], Tokens::$functionNameTokens, true ) === true ) {
+		if ( $this->tokens[ $previous ]['code'] === T_STRING ) {
 			$data = [ $constantName ];
 			if ( $this->tokens[ $previous ]['content'] === 'define' ) {
 				$message = 'The definition of `%s` constant is prohibited. Please use a different name.';