Fix: Remove DiffEqBase from test targets as well

DiffEqBase was removed from extras but still referenced in test targets,
causing package resolution errors. This commit removes it from the
targets section as well.

Author: claude

lib/OrdinaryDiffEqAdamsBashforthMoulton/Project.toml

@@ -47,7 +47,7 @@ Reexport = "1.2"
 SafeTestsets = "0.1.0"
 
 [targets]
-test = ["DiffEqDevTools", "ODEProblemLibrary", "Random", "SafeTestsets", "Test", "DiffEqBase", "JET", "Aqua", "AllocCheck"]
+test = ["DiffEqDevTools", "ODEProblemLibrary", "Random", "SafeTestsets", "Test", "JET", "Aqua", "AllocCheck"]
 
 [sources.OrdinaryDiffEqLowOrderRK]
 path = "../OrdinaryDiffEqLowOrderRK"

lib/OrdinaryDiffEqExtrapolation/Project.toml

@@ -49,7 +49,7 @@ Reexport = "1.2"
 SafeTestsets = "0.1.0"
 
 [targets]
-test = ["DiffEqDevTools", "Random", "SafeTestsets", "Test", "DiffEqBase", "JET", "Aqua", "AllocCheck"]
+test = ["DiffEqDevTools", "Random", "SafeTestsets", "Test", "JET", "Aqua", "AllocCheck"]
 
 [sources.OrdinaryDiffEqDifferentiation]
 path = "../OrdinaryDiffEqDifferentiation"