Revert Acrolinx 3

Author: rmca14

docs/error-messages/toc.yml

@@ -88,6 +88,10 @@ items:
   items: 
     - name: Compiler fatal errors C999 through C1999
       href: compiler-errors-1/compiler-fatal-errors-c999-through-c1999.md
+    - name: Fatal error C999
+      href: compiler-errors-1/fatal-error-c999.md
+    - name: Fatal error C1000, C1999
+      href: compiler-errors-1/fatal-error-c1000-c1999.md
     - name: Fatal error C1001
       href: compiler-errors-1/fatal-error-c1001.md
     - name: Fatal error C1002
@@ -4327,6 +4331,8 @@ items:
           href: compiler-warnings/compiler-warning-level-3-c4996.md
         - name: Compiler warning (level 1) C4997
           href: compiler-warnings/compiler-warning-level-1-c4997.md
+        - name: Compiler warning (level 1) C4999
+          href: compiler-warnings/compiler-warning-level-1-c4999.md
     - name: Compiler warnings C5000 through C5199
       expanded: false
       items: