chore(tidy3d-client): remove unused gl3w submodule and references (#3858)

Compute-RevId: 35aad79ef3e39966c3a05d136b70a1ea349c43af
Flex-RevId: 46ccbe9ba0068e06dc2b1a3b43b29e2215e5b1d8

Author: dmarek-flex

docs/extras/third_party_licenses.rst

@@ -629,36 +629,6 @@ OpenSSL
 
     END OF TERMS AND CONDITIONS
 
-gl3w
-----
-
-`gl3w <https://github.com/skaslev/gl3w>`_
-
-::
-
-    This is free and unencumbered software released into the public domain.
-
-    Anyone is free to copy, modify, publish, use, compile, sell, or
-    distribute this software, either in source code form or as a compiled
-    binary, for any purpose, commercial or non-commercial, and by any
-    means.
-
-    In jurisdictions that recognize copyright laws, the author or authors
-    of this software dedicate any and all copyright interest in the
-    software to the public domain. We make this dedication for the benefit
-    of the public at large and to the detriment of our heirs and
-    successors. We intend this dedication to be an overt act of
-    relinquishment in perpetuity of all present and future rights to this
-    software under copyright law.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-    IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
-    OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-    OTHER DEALINGS IN THE SOFTWARE.
-
 HDF5
 ----