remove unused code highlight classes (#498)

Author: fmichonneau

assets/css/lesson.scss

@@ -43,29 +43,29 @@ div.warning { @include cdSetup($color-warning); }
 div.output  { @include cdSetup($color-output); }
 div.source  { @include cdSetup($color-source); }
 
-div.bash, div.language-bash     { @include cdSetup($color-source); }
-div.c, div.language-c           { @include cdSetup($color-source); }
-div.cmake, div.language-cmake   { @include cdSetup($color-source); }
-div.cpp, div.language-cpp       { @include cdSetup($color-source); }
-div.make, div.language-make     { @include cdSetup($color-source); }
-div.matlab, div.language-matlab { @include cdSetup($color-source); }
-div.python, div.language-python { @include cdSetup($color-source); }
-div.r, div.language-r           { @include cdSetup($color-source); }
-div.sql, div.language-sql       { @include cdSetup($color-source); }
+div.language-bash     { @include cdSetup($color-source); }
+div.language-c        { @include cdSetup($color-source); }
+div.language-cmake    { @include cdSetup($color-source); }
+div.language-cpp      { @include cdSetup($color-source); }
+div.language-make     { @include cdSetup($color-source); }
+div.language-matlab   { @include cdSetup($color-source); }
+div.language-python   { @include cdSetup($color-source); }
+div.language-r        { @include cdSetup($color-source); }
+div.language-sql      { @include cdSetup($color-source); }
 
 div.error::before,
 div.warning:before,
 div.output::before,
 div.source::before,
-div.bash::before, div.language-bash::before,
-div.c::before, div.language-c::before,
-div.cmake::before, div.language-cmake::before,
-div.cpp::before, div.language-cpp::before,
-div.make::before, div.language-make::before,
-div.matlab::before, div.language-matlab::before,
-div.python::before, div.language-python::before,
-div.r::before, div.language-r::before,
-div.sql::before, div.language-sql::before {
+div.language-bash::before,
+div.language-c::before,
+div.language-cmake::before,
+div.language-cpp::before,
+div.language-make::before,
+div.language-matlab::before,
+div.language-python::before,
+div.language-r::before,
+div.language-sql::before {
     background-color: #f2eff6;
     display: block;
     font-weight: bold;
@@ -76,15 +76,16 @@ div.error::before  { background-color: #ffebe6; content: "Error"; }
 div.warning:before { background-color: #f8f4e8; content:" Warning"; }
 div.output::before { background-color: #efefef; content: "Output"; }
 div.source::before { content: "Code"; }
-div.bash::before, div.language-bash::before { content: "Bash"; }
-div.c::before, div.language-c::before { content: "C"; }
-div.cmake::before, div.language-cmake::before { content: "CMake"; }
-div.cpp::before, div.language-cpp::before { content: "C++"; }
-div.make::before, div.language-make::before { content: "Make"; }
-div.matlab::before, div.language-matlab::before { content: "Matlab"; }
-div.python::before, div.language-python::before { content: "Python"; }
-div.r::before, div.language-r::before { content: "R"; }
-div.sql::before, div.language-sql::before { content: "SQL"; }
+
+div.language-bash::before   { content: "Bash"; }
+div.language-c::before      { content: "C"; }
+div.language-cmake::before  { content: "CMake"; }
+div.language-cpp::before    { content: "C++"; }
+div.language-make::before   { content: "Make"; }
+div.language-matlab::before { content: "Matlab"; }
+div.language-python::before { content: "Python"; }
+div.language-r::before      { content: "R"; }
+div.language-sql::before    { content: "SQL"; }
 
 // Tab panels are used on Setup pages to show instructions for different Operating Systems
 .tab-pane {