update: gopath removed from the first directory exercises etc

Author: inancgumus

first/first/exercises/02/exercise.md

@@ -34,7 +34,7 @@ func main() {
 	// Println function of "fmt" package becomes available
 
 	// Look at what it looks like by typing in the console:
-	//   godoc -src fmt Println
+	//   go doc -src fmt Println
 
 	// Println is just an exported function from
 	//   "fmt" package

first/first/exercises/02/solution/solution.md

@@ -9,28 +9,6 @@
 >
 >
 
-
-## Which directory `go build` puts the compiled code into?
-1. The same directory where you call `go build` *CORRECT*
-2. $GOPATH/src directory
-3. $GOPATH/pkg directory
-4. Into a temporary directory.
-
-> **2:** There only lives Go source-code files
->
->
-> **3:** Go only puts your code there when you call `go install`.
->
->
-
-
-## Which directory `go run` puts the compiled code into?
-1. The same directory where you call `go run`
-2. $GOPATH/src directory
-3. $GOPATH/pkg directory
-4. Into a temporary directory. *CORRECT*
-
-
 ## Which one below is true for runtime?
 1. It happens when your program starts running on a computer *CORRECT*
 2. It happens while your program is being compiled