Generic/InlineControlStructure: remove redundant condition

This commit removes a redundant condition that was added in fbea319 to
support JS braceless do-while loops. A subsequent commit added similar
code to support braceless do-while loops (plus for/while loops without
body) for PHP, but it also works for JS (13c803b).

There are a few syntax error cases that were handled by the code that is
removed by this commit and are not handled by the code introduced in
13c803b. Without the removed code, they are now handled in a if
condition right below. I added two tests with those cases to ensure the
sniff continues working as expected.

src/Standards/Generic/Sniffs/ControlStructures/InlineControlStructureSniff.php

@@ -95,21 +95,6 @@ public function process(File $phpcsFile, $stackPtr)
                     return;
                 }
             }
-
-            // In Javascript DO WHILE loops without curly braces are legal. This
-            // is only valid if a single statement is present between the DO and
-            // the WHILE. We can detect this by checking only a single semicolon
-            // is present between them.
-            if ($tokens[$stackPtr]['code'] === T_WHILE && $phpcsFile->tokenizerType === 'JS') {
-                $lastDo        = $phpcsFile->findPrevious(T_DO, ($stackPtr - 1));
-                $lastSemicolon = $phpcsFile->findPrevious(T_SEMICOLON, ($stackPtr - 1));
-                if ($lastDo !== false && $lastSemicolon !== false && $lastDo < $lastSemicolon) {
-                    $precedingSemicolon = $phpcsFile->findPrevious(T_SEMICOLON, ($lastSemicolon - 1));
-                    if ($precedingSemicolon === false || $precedingSemicolon < $lastDo) {
-                        return;
-                    }
-                }
-            }
         }//end if
 
         if (isset($tokens[$stackPtr]['parenthesis_opener'], $tokens[$stackPtr]['parenthesis_closer']) === false

src/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.2.js

@@ -0,0 +1,5 @@
+// Intentional parse error (missing closing parenthesis).
+// This should be the only test in this file.
+// Testing that the sniff is *not* triggered.
+
+do i++; while (i < 5

src/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.3.js

@@ -0,0 +1,5 @@
+// Intentional parse error (missing opening parenthesis).
+// This should be the only test in this file.
+// Testing that the sniff is *not* triggered.
+
+do i++; while