Revert "Update .travis.yml, mkdocs.yml: Fixes #44"

.travis.yml

@@ -5,6 +5,5 @@ install:
   - pip install mkdocs
   - pip install mkdocs-material
   - pip install pymdown-extensions
-  - pip install mkdocs-git-revision-date-plugin
 script:
   - mkdocs build

docs/meta/core-template.md

@@ -6,8 +6,6 @@
 - // [Title] is the display name entry from the core's info file
 - // https://github.com/libretro/libretro-super/tree/master/dist/info
 
-**Page last revised on: {{ git_revision_date }}**
-
 ## Background
 
 [Background info]

mkdocs.yml

@@ -337,5 +337,3 @@ markdown_extensions:
       permalink: true
   - pymdownx.details
   - pymdownx.superfences
-plugins:
-  - git-revision-date