removed tree-sitter COBOL from the dependencies.

[taisazero]

The tree-sitter COBOL is a broken dependency and results in the following error on Windows:

pip failed to build package:
    code-nav-devon

Some possibly relevant errors from pip install:
    warning: [email protected]: Compiler family detection failed due to error: ToolExecError: Command "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.40.33807\\bin\\HostX64\\x64\\cl.exe" "-E" "C:\\Users\\myuser\\AppData\\Local\\Temp\\pip-install-3bemqkjo\\code-nav-devon_210f3ff557814fb6813fb5a48d037cea\\target\\release\\build\\tree-sitter-COBOL-ddd2bf2a20f798aa\\out\\11135311020291847115detect_compiler_family.c" with args C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.40.33807\bin\HostX64\x64\cl.exe did not execute successfully (status code exit code: 2).

Ref: entropy-research/Devon#93

[Mihir1003]

Thanks for catching this!!