removed unused defines

.idea/vcs.xml

@@ -3,6 +3,5 @@
   <component name="VcsDirectoryMappings">
     <mapping directory="" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/extlibs/googletest" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/extlibs/vcpkg" vcs="Git" />
   </component>
 </project>

include/omath/linear_algebra/mat.hpp

@@ -11,13 +11,6 @@
 #include <stdexcept>
 #include <utility>
 
-#ifdef near
-#undef near
-#endif
-
-#ifdef far
-#undef far
-#endif
 
 namespace omath
 {
@@ -88,7 +81,7 @@ namespace omath
         }
 
         [[nodiscard]]
-        constexpr Type& operator[](const size_t row, const size_t col) const
+        constexpr const Type& operator[](const size_t row, const size_t col) const
         {
             return at(row, col);
         }