Remove macos-13 from CI

Signed-off-by: falkTX <falktx@falktx.com>

Author: falkTX

.github/workflows/build.yml

@@ -13,7 +13,6 @@ jobs:
     strategy:
       matrix:
         os:
-          - macos-13
           - macos-14
           - macos-15
           # webgui failure

.github/workflows/cmake.yml

@@ -39,21 +39,6 @@ jobs:
           suffix: _24_04
           target: ${{ matrix.target }}
 
-  macos-13:
-    strategy:
-      matrix:
-        target: [macos-intel, macos-universal, macos-10.15]
-    runs-on: macos-13
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: recursive
-      - uses: distrho/dpf-cmake-action@v1
-        with:
-          dpf_path: .
-          suffix: _13
-          target: ${{ matrix.target }}
-
   macos-14:
     strategy:
       matrix:

.github/workflows/example-plugins.yml

@@ -39,21 +39,6 @@ jobs:
           suffix: _24_04
           target: ${{ matrix.target }}
 
-  macos-13:
-    strategy:
-      matrix:
-        target: [macos-intel, macos-universal, macos-10.15]
-    runs-on: macos-13
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: recursive
-      - uses: distrho/dpf-makefile-action@v1
-        with:
-          dpf_path: .
-          suffix: _13
-          target: ${{ matrix.target }}
-
   macos-14:
     strategy:
       matrix: