ci: Remove the dead submodules checkout option

The repository has had no submodules since the NDK moved to
sentry-native (#3189), which left `.gitmodules` empty. The
`submodules: 'recursive'` input on our checkout steps has been a no-op
since, so drop it along with the empty file.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: runningcode

.github/workflows/agp-matrix.yml

@@ -29,8 +29,6 @@ jobs:
     steps:
       - name: Checkout Repo
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: Setup Java Version
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/build.yml

@@ -23,7 +23,6 @@ jobs:
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           ref: ${{ github.event.pull_request.head.sha || github.sha }}
-          submodules: 'recursive'
 
       - name: Setup Java Version
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/codeql-analysis.yml

@@ -21,8 +21,6 @@ jobs:
     steps:
       - name: Checkout Repo
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: Setup Java Version
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/format-code.yml

@@ -9,8 +9,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: set up JDK 17
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/generate-javadocs.yml

@@ -10,8 +10,6 @@ jobs:
     steps:
       - name: Checkout 🛎️
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: set up JDK 17
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/integration-tests-ui.yml

@@ -23,8 +23,6 @@ jobs:
     steps:
       - name: Git checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: 'Set up Java: 17'
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/release-build.yml

@@ -16,8 +16,6 @@ jobs:
     steps:
       - name: Checkout Repo
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: Setup Java Version
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/release.yml

@@ -32,7 +32,6 @@ jobs:
           token: ${{ steps.token.outputs.token }}
           # Needs to be set, otherwise git describe --tags will fail with: No names found, cannot describe anything
           fetch-depth: 0
-          submodules: 'recursive'
       - name: Prepare release
         uses: getsentry/craft@90e8e203ad86c8ab8ee134e8d387def13e620e81 # v3
         env:

.github/workflows/spring-boot-2-matrix.yml

@@ -47,8 +47,6 @@ jobs:
     steps:
       - name: Checkout Repo
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: Set up Java
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0

.github/workflows/spring-boot-3-matrix.yml

@@ -47,8 +47,6 @@ jobs:
     steps:
       - name: Checkout Repo
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          submodules: 'recursive'
 
       - name: Set up Java
         uses: actions/setup-java@b843ebf9b913146b38da2eaa7aeddf76074ae1ad # v6.1.0