Issue #3127013 by greg.1.anderson, jungle, andrey.troeglazov, andypost,...

Issue #3127013 by greg.1.anderson, jungle, andrey.troeglazov, andypost, Mixologic, Mile23: Remove wikimedia/composer-merge-plugin

composer.json

@@ -12,8 +12,7 @@
         "composer/installers": "^1.0.24",
         "drupal/core": "self.version",
         "drupal/core-project-message": "self.version",
-        "drupal/core-vendor-hardening": "self.version",
-        "wikimedia/composer-merge-plugin": "^1.4"
+        "drupal/core-vendor-hardening": "self.version"
     },
     "require-dev": {
         "behat/mink": "^1.8",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "aff3c3526437393da89a279456ad596b",
+    "content-hash": "169562790cdb1bc09b9ca4ee4f9944e0",
     "packages": [
         {
             "name": "asm89/stack-cors",
@@ -3680,55 +3680,6 @@
                 "stream-wrapper"
             ],
             "time": "2019-12-10T11:53:27+00:00"
-        },
-        {
-            "name": "wikimedia/composer-merge-plugin",
-            "version": "v1.4.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/wikimedia/composer-merge-plugin.git",
-                "reference": "81c6ac72a24a67383419c7eb9aa2b3437f2ab100"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/wikimedia/composer-merge-plugin/zipball/81c6ac72a24a67383419c7eb9aa2b3437f2ab100",
-                "reference": "81c6ac72a24a67383419c7eb9aa2b3437f2ab100",
-                "shasum": ""
-            },
-            "require": {
-                "composer-plugin-api": "^1.0",
-                "php": ">=5.3.2"
-            },
-            "require-dev": {
-                "composer/composer": "~1.0.0",
-                "jakub-onderka/php-parallel-lint": "~0.8",
-                "phpunit/phpunit": "~4.8|~5.0",
-                "squizlabs/php_codesniffer": "~2.1.0"
-            },
-            "type": "composer-plugin",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.3.x-dev"
-                },
-                "class": "Wikimedia\\Composer\\MergePlugin"
-            },
-            "autoload": {
-                "psr-4": {
-                    "Wikimedia\\Composer\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Bryan Davis",
-                    "email": "bd808@wikimedia.org"
-                }
-            ],
-            "description": "Composer plugin to merge multiple composer.json files",
-            "time": "2017-04-25T02:31:25+00:00"
         }
     ],
     "packages-dev": [