Remove some @Deprecated constructors and methods from the `Client`

[dim4o]

As a result of removing the deprecated Screen constructor some gradle dependencies can be omitted:

• com.google.guava:guava:18.0
• org.javassist:javassist:3.18.2-GA
• org.jsoup:jsoup:1.7.2

The org.reflections:reflections:0.9.10 is also redundant because of entity-migration