Remove unsupported Python version 3.15.0-alpha.1 from CI workflows

Author: Евгений Блинов

.github/workflows/lint.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "3.15.0-alpha.1"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t"]
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/tests_and_coverage.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "3.15.0-alpha.1"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t"]
 
     steps:
       - uses: actions/checkout@v4

pyproject.toml

@@ -28,7 +28,6 @@ classifiers = [
     'Programming Language :: Python :: 3.12',
     'Programming Language :: Python :: 3.13',
     'Programming Language :: Python :: 3.14',
-    'Programming Language :: Python :: 3.15',
     'Programming Language :: Python :: Free Threading',
     'Programming Language :: Python :: Free Threading :: 3 - Stable',
     'License :: OSI Approved :: MIT License',