remove all submodules

The submodules system is being replaced with a command-line flag

    hx --fetch-grammars

Which shallow-clones grammar repositories at the given revision and

    hx --build-grammars

For building grammars separate of the initial compilation of helix.

Why remove submodules?

* Cloning helix in general takes a long time because of the submodules,
  especially when the submodules are not fetched as shallow
* Packaging is consistently painful no matter the package-manager
* It is quite difficult to devise a scheme where users can declare
  a desired set of grammars and implement it with submodules

This commit fully removes the existing tree-sitter submodules from
the tree (as well as the .gitmodules file which is no longer used).

57 files changed, 0 insertions, 0 deletions

diff --git a/helix-syntax/languages/tree-sitter-agda b/helix-syntax/languages/tree-sitter-agda
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diff --git a/helix-syntax/languages/tree-sitter-bash b/helix-syntax/languages/tree-sitter-bash
deleted file mode 160000
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diff --git a/helix-syntax/languages/tree-sitter-c b/helix-syntax/languages/tree-sitter-c
deleted file mode 160000
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deleted file mode 160000
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