Removed data solution-folder from solution files. (#490)

* Removed `data` solution-folder from solution files.

Fixes #475.

Author: joshua-light

Microsoft.ML.sln

@@ -34,12 +34,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.ML.Api", "src\Mic
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.ML.Tests", "test\Microsoft.ML.Tests\Microsoft.ML.Tests.csproj", "{64BC22D3-1E76-41EF-94D8-C79E471FF2DD}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "data", "data", "{FDA2FD2C-A708-43AC-A941-4D941B0853BF}"
-	ProjectSection(SolutionItems) = preProject
-		test\data\sentiment_data.tsv = test\data\sentiment_data.tsv
-		test\data\sentiment_test.tsv = test\data\sentiment_test.tsv
-	EndProjectSection
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.ML.TestFramework", "test\Microsoft.ML.TestFramework\Microsoft.ML.TestFramework.csproj", "{B5989C06-4FFA-46C1-9D85-9366B34AB0A2}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.ML.InternalStreams", "src\Microsoft.ML.InternalStreams\Microsoft.ML.InternalStreams.csproj", "{C4F7938F-7109-43C8-92A5-9BE47C7FF7D9}"
@@ -223,7 +217,6 @@ Global
 		{58E06735-1129-4DD5-86E0-6BBFF049AAD9} = {09EADF06-BE25-4228-AB53-95AE3E15B530}
 		{2F636A2C-062C-49F4-85F3-60DCADAB6A43} = {09EADF06-BE25-4228-AB53-95AE3E15B530}
 		{64BC22D3-1E76-41EF-94D8-C79E471FF2DD} = {AED9C836-31E3-4F3F-8ABC-929555D3F3C4}
-		{FDA2FD2C-A708-43AC-A941-4D941B0853BF} = {AED9C836-31E3-4F3F-8ABC-929555D3F3C4}
 		{B5989C06-4FFA-46C1-9D85-9366B34AB0A2} = {AED9C836-31E3-4F3F-8ABC-929555D3F3C4}
 		{C4F7938F-7109-43C8-92A5-9BE47C7FF7D9} = {09EADF06-BE25-4228-AB53-95AE3E15B530}
 		{6B047E09-39C9-4583-96F3-685D84CA4117} = {AED9C836-31E3-4F3F-8ABC-929555D3F3C4}