remove!: All termion-related features are now removed and obsolete.

After the most recent update, certion event-related features in crosstermion
stopped working in the context of the GUI, so it's probably best to let it go.

By now, `crosstermion` is also very much a more portable replacement.

.github/workflows/ci.yml

@@ -17,11 +17,6 @@ jobs:
       run: cargo clippy
     - name: tests
       run: make tests
-    - name: "Check (termion)"
-      uses: actions-rs/cargo@v1
-      with:
-        command: check
-        args: --features=render-tui-termion --all --bins --tests --examples
     - name: "Check (crossterm)"
       uses: actions-rs/cargo@v1
       with:

Cargo.toml

@@ -17,11 +17,6 @@ name = "dashboard"
 path = "examples/dashboard.rs"
 required-features = ["render-tui", "render-tui-crossterm", "render-line", "render-line-crossterm", "signal-hook", "render-line-autoconfigure", "progress-tree"]
 
-[[example]]
-name = "dashboard-termion"
-path = "examples/dashboard.rs"
-required-features = ["render-tui", "render-tui-termion", "render-line", "render-line-termion", "progress-tree"]
-
 [[example]]
 name = "units"
 path = "examples/units.rs"
@@ -45,7 +40,6 @@ progress-log = ["log"]
 unit-bytes = ["bytesize"]
 unit-human = ["human_format"]
 unit-duration = ["humantime"]
-render-tui-termion = ["crosstermion/tui-react-termion"]
 render-tui-crossterm = ["crosstermion/tui-react-crossterm", "crosstermion/input-async-crossterm"]
 render-tui = ["tui",
     "unicode-segmentation",
@@ -58,7 +52,6 @@ render-tui = ["tui",
     "humantime"]
 render-line = ["crosstermion/color", "humantime", "unicode-width"]
 render-line-crossterm = ["crosstermion/crossterm"]
-render-line-termion = ["crosstermion/termion"]
 render-line-autoconfigure = ["is-terminal"]
 
 local-time = ["time"]

Makefile

@@ -13,12 +13,7 @@ check: ## build features in commmon combination to be sure it all stays together
 	cargo check --no-default-features
 	cargo check --features progress-tree,progress-tree-hp-hashmap
 	cargo check --features render-tui,render-tui-crossterm
-	cargo check --features render-tui,render-tui-termion
-	cargo check --features render-line,render-line-termion
-	cargo check --features render-line,render-line-termion,render-line-autoconfigure
-	cargo check --features render-line,render-line-termion,render-line-autoconfigure,signal-hook
 	cargo check --features render-line,render-line-crossterm
-	cargo check --features render-line,render-line-termion,render-tui,render-tui-termion --example dashboard-termion
 	cargo check --features render-line,render-line-crossterm,render-tui,render-tui-crossterm,signal-hook,render-line-autoconfigure --example dashboard
 	cargo check --features unit-bytes,unit-duration,unit-human,render-tui,render-tui-crossterm,render-line,render-line-crossterm,signal-hook --example units
 	cargo check