Delete obsolete+unused files (#5272)

Makefile.toml

@@ -1,24 +0,0 @@
-[tasks.lalrpop]
-install_crate = { crate_name = "lalrpop", binary = "lalrpop", test_arg = "--help" }
-command = "lalrpop"
-args = ["src/parser/parser.lalrpop"]
-
-[tasks.baseline]
-command = "cargo"
-args = ["build", "--bins"]
-
-[tasks.run]
-command = "cargo"
-args = ["run"]
-dependencies = ["baseline"]
-
-[tasks.test]
-command = "cargo"
-args = ["test"]
-dependencies = ["baseline"]
-
-[tasks.check]
-command = "cargo"
-args = ["check"]
-dependencies = ["baseline"]
-

README.build.txt

@@ -1 +0,0 @@
-Nu will look for the plugins in your PATH on startup. While nu will have some functionality without them, for full functionality you'll need to copy them into your path so they can be loaded.

rustfmt.toml

@@ -1 +0,0 @@
-edition = "2018"