[ci] Don't install ragel on cmake build bot images

It is not needed anyway

.circleci/config.yml

@@ -271,7 +271,6 @@ jobs:
       - image: dockcross/android-arm
     steps:
       - checkout
-      - run: apt update && apt install ragel
       - run: cmake -Bbuild -H. -GNinja
       - run: ninja -Cbuild
 
@@ -280,7 +279,6 @@ jobs:
       - image: dockcross/browser-asmjs
     steps:
       - checkout
-      - run: apt update && apt install ragel
       - run: cmake -Bbuild -H. -GNinja
       - run: ninja -Cbuild
 
@@ -289,7 +287,6 @@ jobs:
       - image: dockcross/linux-arm64
     steps:
       - checkout
-      - run: apt update && apt install ragel
       - run: cmake -Bbuild -H. -GNinja
       - run: ninja -Cbuild
 
@@ -298,7 +295,6 @@ jobs:
       - image: dockcross/linux-mips
     steps:
       - checkout
-      - run: apt update && apt install ragel
       - run: cmake -Bbuild -H. -GNinja
       - run: ninja -Cbuild
 
@@ -307,7 +303,6 @@ jobs:
   #    - image: dockcross/windows-x64
   #  steps:
   #    - checkout
-  #    - run: apt update && apt install ragel
   #    - run: cmake -Bbuild -H. -GNinja
   #    - run: ninja -Cbuild