Removed feedback section in blog for Giscus integration

Author: squidfunk

docs/blog/2021/excluding-content-from-search.md

@@ -5,6 +5,8 @@ description: >
   index, allowing for more fine-grained control
 search:
   exclude: true
+hide:
+  - feedback
 ---
 
 # Excluding content from search

docs/blog/2021/search-better-faster-smaller.md

@@ -5,6 +5,8 @@ description: >
   making it faster and smaller at the same time
 search:
   exclude: true
+hide:
+  - feedback
 ---
 
 # Search: better, faster, smaller

docs/blog/2021/the-past-present-and-future.md

@@ -5,6 +5,8 @@ description: >
   features and made this project sustainable
 search:
   exclude: true
+hide:
+  - feedback
 ---
 
 # The past, present and future