Revert installing texinfo in CI systems

This reverts commit 00ff0235.
This reverts commit 11a59de2.

.circleci/config.yml

@@ -10,7 +10,7 @@ jobs:
         name: git
         command: |
           apt-get update
-          apt-get install -y git openssh-client make automake autoconf gcc perl python3 texinfo
+          apt-get install -y git openssh-client make automake autoconf gcc perl python3
     - checkout
     - run:
         name: submodules

.travis.yml

@@ -22,7 +22,6 @@ addons:
     - alex-3.1.7
     - happy-1.19.5
     - python3
-    - texinfo
     #- llvm-3.7
 
 before_install: