Only run 1 injective validator (#3443)

### Description

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### Drive-by changes

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### Related issues

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- Fixes #[issue number here]
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### Backward compatibility

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typescript/infra/config/aw-multisig.json

@@ -80,11 +80,7 @@
     ]
   },
   "injective": {
-    "validators": [
-      "0xbfb8911b72cfb138c7ce517c57d9c691535dc517",
-      "0x6faa139c33a7e6f53cb101f6b2ae392298283ed2",
-      "0x0115e3a66820fb99da30d30e2ce52a453ba99d92"
-    ]
+    "validators": ["0xbfb8911b72cfb138c7ce517c57d9c691535dc517"]
   },
   "mantapacific": {
     "validators": [

typescript/infra/config/environments/mainnet3/validators.ts

@@ -216,11 +216,7 @@ export const validatorChainConfig = (
       reorgPeriod: getReorgPeriod(chainMetadata.injective),
       validators: validatorsConfig(
         {
-          [Contexts.Hyperlane]: [
-            '0xbfb8911b72cfb138c7ce517c57d9c691535dc517',
-            '0x6faa139c33a7e6f53cb101f6b2ae392298283ed2',
-            '0x0115e3a66820fb99da30d30e2ce52a453ba99d92',
-          ],
+          [Contexts.Hyperlane]: ['0xbfb8911b72cfb138c7ce517c57d9c691535dc517'],
           [Contexts.ReleaseCandidate]: [],
           [Contexts.Neutron]: [],
         },