Remove copyright comments for each file #96

Job	Run time
cross-compile-ios (macos-latest, 1.70.0, aarch64-apple-ios)	26s
cross-compile (ubuntu-latest, 1.70.0, aarch64-linux-android)	15s
test (ubuntu-latest, 1.70.0)	13s
cross-compile (ubuntu-latest, 1.70.0, i686-pc-windows-gnu)	14s
test (ubuntu-latest, stable)	7s
cross-compile (ubuntu-latest, 1.70.0, i686-unknown-freebsd)	14s
test (ubuntu-latest, beta)	12s
cross-compile (ubuntu-latest, 1.70.0, i686-unknown-linux-gnu)	19s
test (ubuntu-latest, nightly)	15s
cross-compile (ubuntu-latest, 1.70.0, wasm32-unknown-unknown)	14s
test (macos-latest, 1.70.0)	17s
cross-compile (ubuntu-latest, 1.70.0, x86_64-apple-darwin)	14s
test (macos-latest, stable)	11s
cross-compile (ubuntu-latest, 1.70.0, x86_64-unknown-redox)	17s
test (macos-latest, beta)	17s
test (macos-latest, nightly)	17s
test (windows-latest, 1.70.0)	47s
test (windows-latest, stable)	1m 26s
test (windows-latest, beta)	49s
test (windows-latest, nightly)	53s
	7m 57s

Provide feedback