Remove Kusama and Polkadot runtime-migration checks

Will be removed in #1304 anyway.

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

.gitlab/pipeline/check.yml

@@ -121,30 +121,6 @@ test-rust-feature-propagation:
           --runtime ./target/release/wbuild/"$NETWORK"-runtime/target/wasm32-unknown-unknown/release/"$NETWORK"_runtime.wasm \
           on-runtime-upgrade --checks=pre-and-post live --uri wss://${NETWORK}-try-runtime-node.parity-chains.parity.io:443
 
-check-runtime-migration-polkadot:
-  stage: check
-  extends:
-    - .docker-env
-    - .test-pr-refs
-    - .check-runtime-migration
-  variables:
-    NETWORK: "polkadot"
-  allow_failure: true # FIXME https://github.com/paritytech/substrate/issues/13107
-
-check-runtime-migration-kusama:
-  stage: check
-  # DAG
-  needs:
-    - job: check-runtime-migration-polkadot
-      artifacts: false
-  extends:
-    - .docker-env
-    - .test-pr-refs
-    - .check-runtime-migration
-  variables:
-    NETWORK: "kusama"
-  allow_failure: true # FIXME https://github.com/paritytech/substrate/issues/13107
-
 check-runtime-migration-westend:
   stage: check
   extends:
@@ -153,7 +129,6 @@ check-runtime-migration-westend:
     - .check-runtime-migration
   variables:
     NETWORK: "westend"
-  allow_failure: true # FIXME https://github.com/paritytech/substrate/issues/13107
 
 check-runtime-migration-rococo:
   stage: check
@@ -167,7 +142,6 @@ check-runtime-migration-rococo:
     - .check-runtime-migration
   variables:
     NETWORK: "rococo"
-  allow_failure: true # FIXME https://github.com/paritytech/substrate/issues/13107
 
 find-fail-ci-phrase:
   stage: check