Remove code that is in the notebooks

Slides/part1/what-a-character-unicode-support-in-java.md

@@ -43,117 +43,6 @@ So,
 - Java 5 APIs allow for `int` code points instead of surrogate pairs
 
 
-## Valid Character Literals
-
-```java
-char ch1 = 'a';
-char ch2 = '東'; // (Not an ASCII character!)
-```
-
-However,
-```java
-char ch3 = '𐐀'; // (Not a BMP character!)
-```
-is a syntax error, since 'DESERET CAPITAL LETTER LONG I' - 𐐀 needs surrogate pairs.
-
-
-## Unicode Notation in Strings
-
-- `\uHHHH` - where H is a case-insensitive hexadecimal character
-- Only supports the Basic Multilingual Plane
-- Supplementary characters are represented as **surrogate pairs**
-
-```java
-char ch5 = '\u00EA'; // ‘ê’
-String str1 = "a\u00ea\u00f1\u00fcc"; // “aêñüc”
-String str2 = "A\u00EA\u00F1\u00FCC"; // “AêñüC”
-```
-
-
-## Literal Surrogate Pairs
-
-- Supplementary characters are written as **surrogate pairs**
-
-```java
-// Character outside the BMP
-String str3 = "\uD801\uDC00"; // ‘𐐀’
-```
-
-**Result:**
-
-`str3.length()` is 2
-`str3.codePointCount()` is 1
-
-
-## Unicode Code Point Literals
-
-- `0xHHHHHH` - where H is a case-insensitive hexadecimal character
-- Specify code plane with code point
-- No surrogate pairs needed
-- Not all Java APIs support `int` code points
-
-
-## Unicode Code Point Literals
-
-```java
-// Character outside the BMP
-int cp1 = 0x010400; // 𐐀
-String str4 = new StringBuffer()
-                 .appendCodePoint(cp).toString();
-String str5 = Character.toString(cp1);
-```
-
-**Result:**
-
-`str4.length()` is 2
-`str4.codePointCount()` is 1
-
-
-## Escape Sequences
-
-Built-in escape sequences
-
-![w:700](escape-sequences.png "Escape Sequences")
-
-
-## Unicode Cases
-
-```java
-String greekWord = "ΣΚΎΛΟΣ"; // dog
-String greekLower = greekWord.toLowerCase();
-```
-
-**Result:**
-`greekLower` is "σκύλος"
-(Notice that the first and last letter are both sigma)
-
-
-## Unicode Cases
-
-```java
-String germanWord = "straße"; // street
-String germanUpper = germanWord.toUpperCase();
-```
-
-**Result:**
-`germanUpper` is "STRASSE"
-(Notice that the string lengths are different)
-
-
-## Unicode Integer Parsing
-
-```java
-String hindiNumber = "१२३४५६७८९०";
-int number = Integer.parseInt(hindiNumber);
-```
-
-**Result:**
-
-`number` is 1234567890
-
-
-
-
 ## Use the Character Class
 
 ```java