Use default CI workflow timeouts

Two-hour job limits continue to cancel otherwise healthy CI runs when
integration tests are slow. Remove the overrides from every workflow so
GitHub Actions applies its platform defaults.

Co-Authored-By: HAL 9000

Author: tnull

.github/workflows/0fc-integration.yml

@@ -8,7 +8,6 @@ concurrency:
 
 jobs:
   build-and-test:
-    timeout-minutes: 120
     runs-on: self-hosted
     steps:
       - name: Checkout source code

.github/workflows/audit.yml

@@ -6,7 +6,6 @@ on:
 
 jobs:
   audit:
-    timeout-minutes: 120
     permissions:
       issues: write
       checks: write

.github/workflows/benchmarks.yml

@@ -8,7 +8,6 @@ concurrency:
 
 jobs:
   benchmark:
-    timeout-minutes: 120
     runs-on: self-hosted
     env:
       TOOLCHAIN: stable

.github/workflows/cln-integration.yml

@@ -8,7 +8,6 @@ concurrency:
 
 jobs:
   check-cln:
-    timeout-minutes: 120
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository

.github/workflows/cron-weekly-rustfmt.yml

@@ -11,7 +11,6 @@ on:
 jobs:
   format:
     name: Nightly rustfmt
-    timeout-minutes: 120
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6

.github/workflows/eclair-integration.yml

@@ -9,7 +9,6 @@ concurrency:
 jobs:
   check-eclair:
     name: check-eclair (${{ matrix.name }})
-    timeout-minutes: 120
     runs-on: ubuntu-latest
     strategy:
       matrix:

.github/workflows/hrn-integration.yml

@@ -8,7 +8,6 @@ concurrency:
 
 jobs:
   build-and-test:
-    timeout-minutes: 120
     runs-on: self-hosted
 
     steps:

.github/workflows/kotlin.yml

@@ -8,7 +8,6 @@ concurrency:
 
 jobs:
   check-kotlin:
-    timeout-minutes: 120
     runs-on: ubuntu-latest
 
     env:

.github/workflows/lnd-integration.yml

@@ -8,7 +8,6 @@ concurrency:
 
 jobs:
   check-lnd:
-    timeout-minutes: 120
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository

.github/workflows/postgres-integration.yml

@@ -9,7 +9,6 @@ concurrency:
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
-    timeout-minutes: 120
 
     services:
       postgres: