Removed highlighted warning
Added H1 title to all notebooks.

Author: JakeRadMSFT

machine-learning/01-Intro to Machine Learning.ipynb

@@ -1,12 +1,5 @@
 {
   "cells": [
-    {
-      "cell_type": "markdown",
-      "metadata": {},
-      "source": [
-        "## ==**This notebook is under active development**=="
-      ]
-    },
     {
       "cell_type": "markdown",
       "metadata": {},
@@ -135,7 +128,6 @@
       "metadata": {},
       "source": [
         "Now we are ready to write the code to achieve the machine learning task we need to do. Always start with creating the [MLContext](https://docs.microsoft.com/dotnet/api/microsoft.ml.mlcontext?view=ml-dotnet) which is the common context for all ML.NET operations"
-
       ]
     },
     {
@@ -248,7 +240,6 @@
       "metadata": {},
       "source": [
         "Now we have the data ready, next we'll create the ML.NET pipeline specifying the trainer we are going to use to build our machine learning model. For house price prediction, we are going to use the regression trainer. ML.NET supports other machine learning trainers which can be used for other scenarios as needed. The pipeline will create what is called [Estimator](https://docs.microsoft.com/dotnet/api/microsoft.ml.iestimator-1?view=ml-dotnet) which used to define the operations applied to the data"
-
       ]
     },
     {
@@ -271,7 +262,6 @@
       "metadata": {},
       "source": [
         "After creating the estimator, we are ready to apply the transformations and trainer defined in the pipeline to the data. To do that, call the [Fit](https://docs.microsoft.com/dotnet/api/microsoft.ml.iestimator-1.fit?view=ml-dotnet) method."
-
       ]
     },
     {
@@ -349,7 +339,6 @@
       "metadata": {},
       "source": [
         "Now we have the trained model ready for prediction. Let's use this model to predict a sample house price. We do that by creating the the prediction engine [PredictionEngine<TSrc,TDst>](https://docs.microsoft.com/dotnet/api/microsoft.ml.predictionengine-2?view=ml-dotnet). The prediction engine is the class for making single predictions on a previously trained model (and preceding transform pipeline). Creation of the prediction engine from the trained model can be done by the following code:"
-
       ]
     },
     {