Small cleanup for the builder files (open-telemetry#64)

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

internal/builder/config.go

@@ -121,17 +121,17 @@ func (c *Config) ParseModules() error {
 }
 
 func parseModules(mods []Module) ([]Module, error) {
-	parsedModules := []Module{}
+	var parsedModules []Module
 	for _, mod := range mods {
-		if len(mod.GoMod) == 0 && !mod.Core {
+		if mod.GoMod == "" && !mod.Core {
 			return mods, fmt.Errorf("%w, module: %q", ErrInvalidGoMod, mod.GoMod)
 		}
 
-		if len(mod.Import) == 0 {
+		if mod.Import == "" {
 			mod.Import = strings.Split(mod.GoMod, " ")[0]
 		}
 
-		if len(mod.Name) == 0 {
+		if mod.Name == "" {
 			parts := strings.Split(mod.Import, "/")
 			mod.Name = parts[len(parts)-1]
 		}

internal/builder/main.go

@@ -27,11 +27,8 @@ import (
 )
 
 var (
-	// ErrFailedToGenerateSourceFromTemplate indicates a failure in writing the final contents to the destination file
-	ErrFailedToGenerateSourceFromTemplate = errors.New("failed to generate source from template")
-
 	// ErrGoNotFound is returned when a Go binary hasn't been found
-	ErrGoNotFound = errors.New("Go binary not found")
+	ErrGoNotFound = errors.New("go binary not found")
 )
 
 // GenerateAndCompile will generate the source files based on the given configuration, update go mod, and will compile into a binary