Remove patch, update README and composer.json.

Issue https://www.drupal.org/project/paragraphs/issues/2901390 has been committed.

README.md

@@ -1,13 +1,6 @@
 # Installation
 
-Use composer to download the module, there is an open issue on Drupal.org
-in Paragraphs that prevents this module from working without a patch.
-Composer should apply the patch automatically.
-
-    composer require drupal/media_attribution
-
-The issue the patch comes from is at https://www.drupal.org/project/paragraphs/issues/2901390
-
+Use composer to download the module,
 When you install the module, it creates the following configurations:
 
   * Taxonomy vocabulary
@@ -17,13 +10,13 @@ When you install the module, it creates the following configurations:
     * License Attribution (license_attribution)
       * This field is automatically added to the Image media type on install.
 
-# Use
+# Useage
 
 The installation script automatically adds the attribution paragraphs field
 to the Image media type if it exists. Otherwise adding attribution
 can be done at Admin -> Structure -> Media Types.
 
-When you click the Embed Media button, the attribution links
+In CKEditor, when you click the Embed Media button, the attribution links
 fields will show up in the Media along with Title, Alt text, etc.
 Alternatively you can edit the media content entity directly.
 

composer.json

@@ -17,17 +17,13 @@
       "Drupal\\media_attribution\\": "src/"
     }
   },
-  "require": {},
+  "require": {
+      "drupal/paragraphs": ">=1.15"
+  },
   "extra": {
     "drush": {
       "services": {
-        "drush.services.yml": "^9"
-      }
-    },
-    "patches": {
-      "drupal/paragraphs": {
-        "Integrity constraint violation: 1048 Column 'langcode' cannot be null":
-        "https://www.drupal.org/files/issues/2020-06-25/paragraphs-2901390-51.patch"
+        "drush.services.yml": ">=9"
       }
     }
   }