[graphql] cleanup: remove unused dependency from the intellij.graphql.yaml module

It isn't used in code and won't work at runtime anyway because there is no corresponding dependency in the plugin descriptor. This change is also necessary to avoid failures in the test which verifies dependencies (IJPL-171921).

GitOrigin-RevId: 1bd310de9bc7de9935363607799043c802f26730

Author: chashnikov

yaml/intellij.graphql.yaml.iml

@@ -22,7 +22,6 @@
     <orderEntry type="module" module-name="intellij.platform.projectModel.impl" />
     <orderEntry type="module" module-name="intellij.platform.backend.workspace" />
     <orderEntry type="module" module-name="intellij.yaml" />
-    <orderEntry type="module" module-name="intellij.yaml.backend" />
     <orderEntry type="module" module-name="intellij.graphql" />
   </component>
 </module>