remove: warmup exercises from the root

Warming Up Exercises.md

@@ -1,39 +0,0 @@
-1. **Run your own program? Say hello to yourself.**
-
-    1. Build your program using `go build`
-   
-    2. And, send it to your friend
-       (s/he should use be using the same operating system)
-       (if you're using windows, then hers/his should be
-       windows too)
-
-    3. And then send your program to a friend with a different
-       operating system.
-
-       (So, you should compile your program for her operating system).
-
-       **For OSX, type:**
-       GOOS=darwin GOARCH=386 go build
-
-       **For Windows:**
-       GOOS=windows GOARCH=386 go build
-
-       **For Linux:**
-       GOOS=linux GOARCH=arm GOARM=7 go build
-
-       **You can find the full list in here:**
-       https://golang.org/doc/install/source#environment
-   
-2. **Call Print instead of Println** to see what happens.
-
-3. **Call Println or Print with multiple values** by separating them using commas.
-
-4. **Remove double quotes from string literals** and see what happens.
-
-5. **Move the package and import statement** to the bottom of the file and see what happens.
-
-6. **Read Go online documentation**. Take a quick look at the packages and read what they do. Look at their source-code by clicking on their titles.
-
-You don't have to understand anything, just do it. This will warm you up for the upcoming lectures. https://golang.org/pkg
-
-7. Also, **take a tour**: https://tour.golang.org/ See the language features. We're going to talk all about them soon.