Remove system parachains Polkadot and Kusama runtimes (#1737)

Since the Polkadot and Kusama runtimes are no longer in the repo, the
relevant systems parachains runtimes also need to be removed. More
context [here](https://github.com/paritytech/polkadot-sdk/issues/603)
and [here](https://github.com/paritytech/polkadot-sdk/pull/1731).

Removes the following:
- `asset-hub-kusama` and `asset-hub-polkadot`
- `bridge-hub-kusama` and `bridge-hub-polkadot`
- `collectives-polkadot`
- `glutton-kusama`

Partially solves #603 and adds to #1731.

.gitlab/pipeline/short-benchmarks.yml

@@ -49,16 +49,6 @@ short-benchmark-westend: &short-bench
   script:
     - ./artifacts/polkadot-parachain benchmark pallet --chain $RUNTIME_CHAIN --pallet "*" --extrinsic "*" --steps 2 --repeat 1
 
-short-benchmark-asset-hub-polkadot:
-  <<: *short-bench-cumulus
-  variables:
-    RUNTIME_CHAIN: asset-hub-polkadot-dev
-
-short-benchmark-asset-hub-kusama:
-  <<: *short-bench-cumulus
-  variables:
-    RUNTIME_CHAIN: asset-hub-kusama-dev
-
 short-benchmark-asset-hub-rococo:
   <<: *short-bench-cumulus
   variables:
@@ -69,16 +59,6 @@ short-benchmark-asset-hub-westend:
   variables:
     RUNTIME_CHAIN: asset-hub-westend-dev
 
-short-benchmark-bridge-hub-polkadot:
-  <<: *short-bench-cumulus
-  variables:
-    RUNTIME_CHAIN: bridge-hub-polkadot-dev
-
-short-benchmark-bridge-hub-kusama:
-  <<: *short-bench-cumulus
-  variables:
-    RUNTIME_CHAIN: bridge-hub-kusama-dev
-
 short-benchmark-bridge-hub-rococo:
   <<: *short-bench-cumulus
   variables:
@@ -89,21 +69,11 @@ short-benchmark-bridge-hub-westend:
   variables:
     RUNTIME_CHAIN: bridge-hub-westend-dev
 
-short-benchmark-collectives-polkadot:
-  <<: *short-bench-cumulus
-  variables:
-    RUNTIME_CHAIN: collectives-polkadot-dev
-
 short-benchmark-collectives-westend:
   <<: *short-bench-cumulus
   variables:
     RUNTIME_CHAIN: collectives-westend-dev
 
-short-benchmark-glutton-kusama:
-  <<: *short-bench-cumulus
-  variables:
-    RUNTIME_CHAIN: glutton-kusama-dev-1300
-
 short-benchmark-glutton-westend:
   <<: *short-bench-cumulus
   variables: