[Examples] removed web_basic_window mentions

[CrackedPixel]

The examples were failing to build in cmake since the example others/web_basic_window was removed

reproduce steps:

# (root folder)
mkdir build
cd build
cmake .. -DPLATFORM=Web

CMake Error at examples/CMakeLists.txt:157 (add_executable):
  Cannot find source file:

    others/web_basic_window.c


CMake Error at examples/CMakeLists.txt:157 (add_executable):
  No SOURCES given to target: web_basic_window

[raysan5]

@CrackedPixel thanks for the update! that raylib_opengl_interop will also disappear soon...