build: Remove macos-13 runner, remove MacOS-x86_64 builds

Author: zuckschwerdt

.github/workflows/check.yml

@@ -5,7 +5,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-13, macos-14, macos-15]
+        os: [macos-14, macos-15]
     runs-on: ${{ matrix.os }}
     name: Build on ${{ matrix.os }}
     steps:

.github/workflows/release.yml

@@ -69,11 +69,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-13, macos-14]
+        os: [macos-14]
         feat: [rtlsdr, soapysdr]
         include:
-          - os: macos-13
-            arch: x86_64
+          #- os: macos-13
+          #  arch: x86_64
           - os: macos-14
             arch: arm64
     runs-on: ${{ matrix.os }}