Fix SignalR build from VS (#8492)

Author: mikaelm12

src/SignalR/SignalR.sln

@@ -75,10 +75,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "perf", "perf", "{AC3CD0BA-D
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "benchmarkapps", "benchmarkapps", "{1AF35754-036E-4D19-BE71-6144CEC0E1D5}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BenchmarkServer", "perf\benchmarkapps\BenchmarkServer\BenchmarkServer.csproj", "{35C0D65F-643E-42FA-9177-2BFFDE9AFA14}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Crankier", "perf\benchmarkapps\Crankier\Crankier.csproj", "{56563C41-59EA-4B7F-94DC-ADD5923EC087}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.SignalR.Microbenchmarks", "perf\Microbenchmarks\Microsoft.AspNetCore.SignalR.Microbenchmarks.csproj", "{B34D6810-1A95-462F-A8DD-76E2B7FC5CEE}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "server", "server", "{37DDE730-33D7-4400-9F12-84F0F2C0F319}"
@@ -279,14 +275,6 @@ Global
 		{21C71457-3910-4BC1-937F-57B0172004CA}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{21C71457-3910-4BC1-937F-57B0172004CA}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{21C71457-3910-4BC1-937F-57B0172004CA}.Release|Any CPU.Build.0 = Release|Any CPU
-		{35C0D65F-643E-42FA-9177-2BFFDE9AFA14}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{35C0D65F-643E-42FA-9177-2BFFDE9AFA14}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{35C0D65F-643E-42FA-9177-2BFFDE9AFA14}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{35C0D65F-643E-42FA-9177-2BFFDE9AFA14}.Release|Any CPU.Build.0 = Release|Any CPU
-		{56563C41-59EA-4B7F-94DC-ADD5923EC087}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{56563C41-59EA-4B7F-94DC-ADD5923EC087}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{56563C41-59EA-4B7F-94DC-ADD5923EC087}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{56563C41-59EA-4B7F-94DC-ADD5923EC087}.Release|Any CPU.Build.0 = Release|Any CPU
 		{B34D6810-1A95-462F-A8DD-76E2B7FC5CEE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{B34D6810-1A95-462F-A8DD-76E2B7FC5CEE}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B34D6810-1A95-462F-A8DD-76E2B7FC5CEE}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -449,8 +437,6 @@ Global
 		{6D9DF750-BA0D-4ED7-8137-732E52894B1C} = {9FCD621E-E710-4991-B45C-1BABC977BEEC}
 		{21C71457-3910-4BC1-937F-57B0172004CA} = {6D9DF750-BA0D-4ED7-8137-732E52894B1C}
 		{1AF35754-036E-4D19-BE71-6144CEC0E1D5} = {AC3CD0BA-DE19-4333-9A42-3CFCC9FF0332}
-		{35C0D65F-643E-42FA-9177-2BFFDE9AFA14} = {1AF35754-036E-4D19-BE71-6144CEC0E1D5}
-		{56563C41-59EA-4B7F-94DC-ADD5923EC087} = {1AF35754-036E-4D19-BE71-6144CEC0E1D5}
 		{B34D6810-1A95-462F-A8DD-76E2B7FC5CEE} = {AC3CD0BA-DE19-4333-9A42-3CFCC9FF0332}
 		{F7CF971E-4FD8-4E3C-9BA1-0A0C84E2E72A} = {37DDE730-33D7-4400-9F12-84F0F2C0F319}
 		{F98DC946-BB11-444E-BD87-13CB07E5E107} = {37DDE730-33D7-4400-9F12-84F0F2C0F319}