Update reference.md

Author: karlsoderby

content/micropython/01.basics/08.reference/reference.md

@@ -1,6 +1,6 @@
 ---
 title: MicroPython Reference
-description: A single document reference of the MicroPython API
+description: A single document reference of the MicroPython API.
 authors: Karl Söderby
 micropython_type: basics
 ---
@@ -19,114 +19,6 @@ The entries are named exactly the same as in the language reference, with the Mi
 
 ***Note that several entries in the original [Language Reference](https://www.arduino.cc/reference/en/) are directly taken from the C++ reference. In the same fashion, many functions located in this reference are taken from the Python reference, and are not MicroPython specific.***
 
-## Index
-
-The entire reference is located inside this document, and the index below helps navigate to the right section.
-
-- [Index](#index)
-- [Digital I/O](#digital-io)
-  - [pinMode()](#pinmode)
-  - [digitalRead()](#digitalread)
-  - [digitalWrite()](#digitalwrite)
-- [Analog I/O](#analog-io)
-  - [Configure Input (ADC)](#configure-input-adc)
-  - [Configure Output (PWM)](#configure-output-pwm)
-  - [analogRead()](#analogread)
-  - [analogWrite()](#analogwrite)
-  - [analogWrite() (STM32)](#analogwrite-stm32)
-- [Time](#time)
-  - [delay()](#delay)
-  - [millis()](#millis)
-- [Bits and Bytes](#bits-and-bytes)
-  - [bitRead()](#bitread)
-  - [bitSet()](#bitset)
-  - [highByte()](#highbyte)
-  - [lowByte()](#lowbyte)
-- [Advanced I/O](#advanced-io)
-  - [noTone()](#notone)
-  - [pulseIn()](#pulsein)
-  - [shiftIn()](#shiftin)
-  - [shiftOut()](#shiftout)
-  - [tone()](#tone)
-- [Math](#math)
-  - [abs()](#abs)
-  - [constrain()](#constrain)
-  - [map()](#map)
-  - [max()](#max)
-  - [min()](#min)
-  - [pow()](#pow)
-  - [sq()](#sq)
-  - [sqrt()](#sqrt)
-- [Trigonometry](#trigonometry)
-  - [cos()](#cos)
-  - [sin()](#sin)
-  - [tan()](#tan)
-- [Characters](#characters)
-  - [isAlpha()](#isalpha)
-  - [isAlphaNumeric()](#isalphanumeric)
-  - [isAscii()](#isascii)
-  - [isControl()](#iscontrol)
-  - [isDigit()](#isdigit)
-  - [isGraph()](#isgraph)
-  - [isLowerCase()](#islowercase)
-  - [isPrintable()](#isprintable)
-  - [isPunct()](#ispunct)
-  - [isSpace()](#isspace)
-  - [isUpperCase()](#isuppercase)
-- [Random Numbers](#random-numbers)
-  - [random()](#random)
-  - [randomSeed()](#randomseed)
-- [External Interrupts](#external-interrupts)
-  - [attachInterrupt()](#attachinterrupt)
-  - [detachInterrupt()](#detachinterrupt)
-- [Serial (USB)](#serial-usb)
-  - [Serial.print()](#serialprint)
-- [Serial1 (UART)](#serial1-uart)
-  - [Serial1.begin()](#serial1begin)
-  - [Serial1.available()](#serial1available)
-  - [Serial1.read()](#serial1read)
-  - [Serial1.write()](#serial1write)
-- [SPI](#spi)
-  - [SPI.begin()](#spibegin)
-  - [SPI.read()](#spiread)
-  - [SPI.write()](#spiwrite)
-  - [SPI.transfer()](#spitransfer)
-  - [Bit Size](#bit-size)
-- [Wire / I2C](#wire--i2c)
-  - [Wire.begin()](#wirebegin)
-  - [Wire.available()](#wireavailable)
-  - [Wire.read()](#wireread)
-  - [Wire.write()](#wirewrite)
-  - [Wire.setClock()](#wiresetclock)
-  - [SoftI2C](#softi2c)
-- [USB HID](#usb-hid)
-- [Data Types](#data-types)
-  - [size\_t](#size_t)
-  - [void](#void)
-- [Conversion](#conversion)
-  - [byte()](#byte)
-  - [char()](#char)
-  - [float()](#float)
-  - [int()](#int)
-- [Local / Global Variables](#local--global-variables)
-- [Sketch](#sketch)
-  - [loop()](#loop)
-  - [setup()](#setup)
-- [Control Structure](#control-structure)
-  - [if](#if)
-  - [else](#else)
-  - [for](#for)
-  - [while](#while)
-  - [break](#break)
-  - [continue](#continue)
-  - [return](#return)
-- [Operators](#operators)
-  - [Arithmetic Operators](#arithmetic-operators)
-  - [Comparison Operators](#comparison-operators)
-  - [Boolean Operators](#boolean-operators)
-  - [Bitwise Operators](#bitwise-operators)
-  - [Compound Operators](#compound-operators)
-
 ## Digital I/O
 
 To access digital GPIOs using MicroPython, we use the `Pin` module. To define a pin, we use `Pin(pin,type)`.