Not suggest exported imports

[yoshitsugu]

I attempted to fix #2079
I'm not familiar with GHC AST kind things. I'd be happy to get some advice if anyone has more smart way to implement this.

[jneira]

Wow the plugin had no test suite??? Many thanks for adding it, a great contribution in its own

[jneira]

It would be great to add it to the github workflow to run them in ci, adding an entry like

haskell-language-server/.github/workflows/test.yml

Lines 207 to 209 in a0cd84b

	- if: matrix.test
	name: Test hls-refine-imports-plugin test suite
	run: cabal test hls-refine-imports-plugin --test-options="-j1 --rerun-update" || cabal test hls-refine-imports-plugin --test-options="-j1 --rerun" || LSP_TEST_LOG_COLOR=0 LSP_TEST_LOG_MESSAGES=true LSP_TEST_LOG_STDERR=true cabal test hls-refine-imports-plugin --test-options="-j1 --rerun"

[yoshitsugu]

OK. I'll fix.

[jneira]

Many thanks for your new contribution!

[pepeiborra]

Thanks for improving this plugin and adding tests!

[jneira]

many thanks!