chore: remove obsolete Mason configuration files

- Remove python.lua and vue.lua files (replaced by dynamic init.lua)
- Remove mason/.gitignore file

lua/plugins/mason/.gitignore

@@ -1 +0,0 @@
-init.lua

lua/plugins/mason/python.lua

@@ -1,27 +0,0 @@
--- Customize Mason
-
----@type LazySpec
-return {
-  -- use mason-tool-installer for automatically installing Mason packages
-  {
-    "WhoIsSethDaniel/mason-tool-installer.nvim",
-    -- overrides `require("mason-tool-installer").setup(...)`
-    opts = {
-      -- Make sure to use the names found in `:Mason`
-      ensure_installed = {
-        -- { "vue-language-server", version = "1.8.27" },
-        "black",
-        "python-lsp-server",
-        "mypy",
-        "pylint",
-        "flake8",
-        "pylama",
-        "bandit",
-        "pydocstyle",
-        "pyproject-flake8",
-        "pyproject-fmt",
-        "reorder-python-imports",
-      },
-    },
-  },
-}

lua/plugins/mason/vue.lua

@@ -1,26 +0,0 @@
--- Customize Mason
-
----@type LazySpec
-return {
-  -- use mason-tool-installer for automatically installing Mason packages
-  {
-    "WhoIsSethDaniel/mason-tool-installer.nvim",
-    -- overrides `require("mason-tool-installer").setup(...)`
-    opts = {
-      -- Make sure to use the names found in `:Mason`
-      ensure_installed = {
-        -- lspconfig
-        "eslint-lsp",
-        "stylelint-lsp",
-        "tailwindcss-language-server",
-        "typescript-language-server",
-        "vue-language-server",
-        -- { "vue-language-server", version = "1.8.27" },
-
-        -- null_ls
-        "stylelint",
-        "prettier",
-      },
-    },
-  },
-}