Revert "Add GitHub action for labelling PRs"

This reverts commit 0ff13dcf.

.github/labeler.yml

@@ -1,64 +0,0 @@
-go:
-  - changed-files:
-      - any-glob-to-any-file:
-          - src/**
-          - main.go
-          - go.mod
-          - go.sum
-
-shell:
-  - changed-files:
-      - any-glob-to-any-file:
-          - shell/**
-
-bash:
-  - changed-files:
-      - any-glob-to-any-file:
-          - shell/**/*.bash
-
-zsh:
-  - changed-files:
-      - any-glob-to-any-file:
-          - shell/**/*.zsh
-
-fish:
-  - changed-files:
-      - any-glob-to-any-file:
-          - shell/**/*.fish
-
-vim:
-  - changed-files:
-      - any-glob-to-any-file:
-          - plugin/**
-
-docs:
-  - changed-files:
-      - any-glob-to-any-file:
-          - '*.md'
-          - doc/**
-          - man/**
-
-ci:
-  - changed-files:
-      - any-glob-to-any-file:
-          - .github/**
-
-build:
-  - changed-files:
-      - any-glob-to-any-file:
-          - Makefile
-          - .goreleaser.yml
-          - Dockerfile
-
-test:
-  - changed-files:
-      - any-glob-to-any-file:
-          - test/**
-          - src/**/*_test.go
-
-install:
-  - changed-files:
-      - any-glob-to-any-file:
-          - install
-          - install.ps1
-          - uninstall