kitchen sink...

just gonna put the changes that I can remember making here:
 - replace blink with native completion (omnifunc)
 - remove some unneeded plugins
 - add a misc function for making sure complex bindings don't cause
   flickering
 - remove some stale snippets
 - remove folding (I don't find myself folding that often)

after/ftplugin/java.lua

@@ -1,6 +1,3 @@
--- FIXME: the following error is emmitted when starting up jdtls:
--- ERROR No LSP client found that supports vscode.java.resolveMainClass
-
 local map, auto = core.misc.map, core.misc.auto
 
 local ok, jdtls = pcall(require, "jdtls")
@@ -73,10 +70,9 @@ local config = {
 
     dap.adapters.java = nil -- remove any old java adapters
     jdtls.setup_dap({ hotcodereplace = "auto" })
-    require("jdtls.dap").setup_dap_main_class_configs()
   end,
 
-  -- don"t print out status messages
+  -- don't print out status messages
   handlers = {
     ["language/status"] = function() end
   },