python-crossbar: drop Python 2 support

Upstream is now Python 3 only.

Quoting the maintainer [1]: "the last version of crossbar with python 2
support: pip install crossbar==18.4.1".

[1] https://github.com/crossbario/crossbar/issues/1332

---
NOTES:

This is only for master branch. Other branches are not affected.

There are newer releases available via pip2 but they are broken in runtime. Some people complained about this on [1].

Based on "f4972e2e8c python-django: bump to version 2.1.2" I assume we don't need any legacy handling for this case.

I followed the convention from the manual:
4. Any dependencies on the toolchain in depends on form
5. Any dependencies on other packages in depends on form

---
 package/python-crossbar/Config.in | 2 ++
 1 file changed, 2 insertions(+)

index 2f9de6e0b5..526d9871be 100644
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_PYTHON_CROSSBAR
 	bool "python-crossbar"
 	depends on BR2_INSTALL_LIBSTDCPP # python-cryptography
+	depends on BR2_PACKAGE_PYTHON3
 	# All the following dependencies are runtime dependencies
 	select BR2_PACKAGE_PYTHON_ATTRS
 	select BR2_PACKAGE_PYTHON_AUTOBAHN

@@ -48,3 +49,4 @@ config BR2_PACKAGE_PYTHON_CROSSBAR
 
 comment "python-crossbar needs a toolchain w/ C++"
 	depends on !BR2_INSTALL_LIBSTDCPP
+	depends on BR2_PACKAGE_PYTHON3

2.17.1

Hello,

Applied to master, thanks.

Thomas

Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com