Remove .bashrc hooks.

The duplicate hooks were because identify wouldn't mark it as a shell
scrip. It does now so there's no point in checking it twice.

.pre-commit-config.yaml

@@ -84,20 +84,12 @@ repos:
       - id: shell-lint
         exclude: &excluded_shellscripts |-
           \.bash_completion\.d/(docker-machine\.bash|fabric-completion.bash|docker-compose)
-      - id: shell-lint
-        name: shell-lint .bashrc
-        files: \.bashrc
-        types: [text]
 
   - repo: https://github.com/shellcheck-py/shellcheck-py.git
     rev: v0.7.2.1
     hooks:
       - id: shellcheck
         exclude: *excluded_shellscripts
-      - id: shellcheck
-        name: Shellcheck .bashrc
-        files: \.bashrc
-        types: [text]
 
   - repo: https://github.com/executablebooks/mdformat.git
     rev: 0.7.4