std json: do not request EVM bytecode (#410)

These compiler outputs are irrelevant for the `resolc` compilation
pipeline. It can also break the compilation pipeline. For example, solc
may reject the code without via-ir or fail during the EVM codegen phase
with stack too deep errors - which is not relevant to us.

---------

Signed-off-by: xermicus <cyrill@parity.io>

crates/solc-json-interface/src/standard_json/input/settings/mod.rs

@@ -112,4 +112,9 @@ impl Settings {
     pub fn selection_to_prune(&self) -> Selection {
         self.output_selection.selection_to_prune()
     }
+
+    /// Removes unneeded selections.
+    pub fn retain_output_selection(&mut self) {
+        self.output_selection.retain();
+    }
 }