Do not depend on "version" crate

We should not depend on the version crate, as it is GPL licensed.

We removed the usage of this crate before, but it was still in the
Cargo.toml files (despite being used in the source).

bin/core/imag/Cargo.toml

@@ -17,7 +17,6 @@ build = "build.rs"
 
 [build-dependencies]
 clap = ">=2.16.1"
-version = "2.0"
 libimagrt       = { version = "0.8.0", path = "../../../lib/core/libimagrt" }
 libimagentrytag = { version = "0.8.0", path = "../../../lib/entry/libimagentrytag" }
 libimagutil     = { version = "0.8.0", path = "../../../lib/etc/libimagutil" }

bin/domain/imag-wiki/Cargo.toml

@@ -21,7 +21,6 @@ log = "0.3"
 toml = "0.4"
 toml-query = "0.6"
 is-match = "0.1"
-version = "2.0.1"
 regex = "0.2"
 filters = "0.2"