CI: drop travis tasks with 2019.1
CI: drop travis tasks with 2019.1

Undin/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,intellij-rust/intellij-rust,intellij-rust/intellij-rust