Issue #3239466: Refactor build tests to use core-supported project templates

package_manager/src/ProcessFactory.php

@@ -47,16 +47,10 @@ final class ProcessFactory implements ProcessFactoryInterface {
    * {@inheritdoc}
    */
   public function create(array $command): Process {
-    if ($this->isComposerCommand($command)) {
-      array_unshift($command, '-dpcre.jit=0');
-      array_unshift($command, PHP_BINARY);
-      $composer_command = TRUE;
-    }
-
     $process = $this->decorated->create($command);
 
     $env = $process->getEnv();
-    if ($this->isComposerCommand($command) || isset($composer_command)) {
+    if ($this->isComposerCommand($command)) {
       $env['COMPOSER_HOME'] = $this->getComposerHomePath();
     }
     // Ensure that the running PHP binary is in the PATH.