Remove unused files (#392)

pipeline/backend/backend.go

@@ -10,15 +10,20 @@ import (
 type Engine interface {
 	// Setup the pipeline environment.
 	Setup(context.Context, *Config) error
+
 	// Start the pipeline step.
 	Exec(context.Context, *Step) error
+
 	// Kill the pipeline step.
 	Kill(context.Context, *Step) error
+
 	// Wait for the pipeline step to complete and returns
 	// the completion results.
 	Wait(context.Context, *Step) (*State, error)
+
 	// Tail the pipeline step logs.
 	Tail(context.Context, *Step) (io.ReadCloser, error)
+
 	// Destroy the pipeline environment.
 	Destroy(context.Context, *Config) error
 }

pipeline/multipart/analysis/doc.go

@@ -1 +0,0 @@
-package analysis

pipeline/multipart/coverage/doc.go

@@ -1 +0,0 @@
-package coverage

pipeline/multipart/doc.go

@@ -1 +0,0 @@
-package multipart

pipeline/multipart/selenium/doc.go

@@ -1 +0,0 @@
-package selenium

pipeline/multipart/terminal/doc.go

@@ -1 +0,0 @@
-package terminal